EP 0267581 A2 19880518 - Moving image signal coding system.
Title (en)
Moving image signal coding system.
Title (de)
System zum Kodieren eines Bewegtbildsignals.
Title (fr)
Système de codage d'une signal d'une image animée.
Publication
Application
Priority
JP 26736786 A 19861110
Abstract (en)
A system of coding moving image signals for producing a predictive error signal by a predictive coding based on inter-frame correlation and quantizing by a quantization unit (6) the produced predictive error signal for each block of a picture frame constituted by N lines of M pixels includes a block coding/non-coding decision unit (2A) for calculating a first evaluation value Sm of the predictive error signal for each block of the picture frame and deciding that a block non-coding is applicable when the first evaluation value Sm is less than a first threshold value T1, and deciding that a block coding is applicable when the first evaluation value Sm is greater than the first threshold value T1. The predictive error signal is not transmitted when the result of the decision is for a block non-coding, and the predictive error signal is quantized and transmitted when the result of the decision is for a block coding.
IPC 1-7
IPC 8 full level
G06T 9/00 (2006.01); H03M 7/30 (2006.01); H03M 7/38 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01); H04N 7/32 (2006.01); H04N 7/50 (2006.01)
CPC (source: EP US)
H04N 19/107 (2014.11 - EP US); H04N 19/132 (2014.11 - EP US); H04N 19/176 (2014.11 - EP US); H04N 19/61 (2014.11 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0267581 A2 19880518; EP 0267581 A3 19901003; EP 0267581 B1 19950920; CA 1320563 C 19930720; DE 3751529 D1 19951026; DE 3751529 T2 19960404; JP H082106 B2 19960110; JP S63121372 A 19880525; US 4837618 A 19890606
DOCDB simple family (application)
EP 87116594 A 19871110; CA 551423 A 19871109; DE 3751529 T 19871110; JP 26736786 A 19861110; US 11846787 A 19871109